secretary of defense chuck hagel placed a wreath at the navy yard in memory of the 12 people who were killed in the shooting rampage yesterday. we've learned a lot about the gunman tonight, but first, we want to tell you about some of the victims. john johnson was 73. he managed construction work. his wife, judy, spoke today with four of their eight children. >> we were going to retire soon, and he loved his job. he wanted to keep working because he just loved it. loved all the people he worked with, never met a stranger in his life. just a very happy, positive, wonderful, loving human being. >> pelley: richard ridgell, 52, was a security analyst who also served in iraq. his daughter megan spoke today for his wife tracy and their family. >> i don't want people to remember him as a victim because he never was in his life and he never will be. he's strong, and i want him to be known as a dad above a victim of a shooting because he was a great dad for all of us. >> pelley: 50-year-old frank kohler worked for defense contractor lockheed martin. he was married with two college- aged daught